function sys_js()
{
	return this;
}
	sys_js.prototype.object=function(id)
	{
		return document.getElementById ? document.getElementById(id) : (document.all ? document.all[id] : (document.layers ? document.layers[id] : null));
	}

	sys_js.prototype.set_value=function(id, value)
	{
		var object=this.object(id);
		if ( object )
		{
			object.value = value;
		}
		object.focus();
		return false;
	}

	sys_js.prototype.set_value_radio=function(id, value)
	{
		var object=this.object(id + '_' + value);
		if ( object )
		{
			object.checked='checked';
		}
		object.focus();
		return false;
	}

	sys_js.prototype.show=function(id)
	{
		var object=this.object(id);
		if ( object )
		{
			object.style.display='display';
		}
		return false;
	}

	sys_js.prototype.hide=function(id)
	{
		var object=this.object(id);
		if ( object )
		{
			object.style.display='none';
		}
		return false;
	}

// instantiate
sys = new sys_js();